Question

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Explanation:

In Spanish, the informal second-person singular form "tú" (used with peers like someone your age) pairs with the conjugated verb "estás". ¿Cómo estás? is the standard informal way to ask "How are you?". ¿Cómo está? uses formal "usted", ¿Y tú? means "And you?", and ¿Qué pasa? means "What's up?".

Answer:

A. ¿Cómo estás?